EP0820363A1 - Method for laser marking a glass object, and resulting marked glass object, particularly a mould for an ophthalmic lens - Google Patents
Method for laser marking a glass object, and resulting marked glass object, particularly a mould for an ophthalmic lensInfo
- Publication number
- EP0820363A1 EP0820363A1 EP96912085A EP96912085A EP0820363A1 EP 0820363 A1 EP0820363 A1 EP 0820363A1 EP 96912085 A EP96912085 A EP 96912085A EP 96912085 A EP96912085 A EP 96912085A EP 0820363 A1 EP0820363 A1 EP 0820363A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- glass object
- glass
- layer
- mark
- laser beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/021—Lenses; Lens systems ; Methods of designing lenses with pattern for identification or with cosmetic or therapeutic effects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/18—Working by laser beam, e.g. welding, cutting or boring using absorbing layers on the workpiece, e.g. for marking or protecting purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/262—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used recording or marking of inorganic surfaces or materials, e.g. glass, metal, or ceramics
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/32—After-treatment
Definitions
- the present invention relates generally to the marking of any glass object, for the application, for example, to it, of a serial number, a reference, or any other registration.
- the present invention however relates more particularly, but not necessarily necessarily exclusively, to the marking of the molding shells used for the molding of ophthalmic lenses of synthetic material.
- the mark obtained necessarily has relatively large dimensions, so that, even if it is affixed to the periphery of a molding shell, it inevitably encroaches, in projection, on at least part of the useful area of this molding shell.
- the cement used is in practice most often opaque to ultraviolet radiation.
- the mark can therefore in this case be inadvertently a nuisance during the process of manufacturing a ophthalmic lens if the polymerization of the corresponding synthetic material involves exposure to such radiation.
- the glass being transparent at the wavelength of the corresponding laser beam, it must be made to interfere with a layer of a suitable material duly applied on the surface for this purpose on the glass object to be treated.
- the material constituting the layer used is chosen to be opaque to the wavelength of the laser beam.
- the present invention generally relates to a provision making it possible to advantageously take advantage of an additional layer of material used, for improving the operating conditions of the mark obtained.
- the first relates to a method for marking a glass object, of the kind according to which a surface is applied to it a layer of a material with which a beam is made to interfere laser, this process being generally characterized in that one chooses for material constituting this layer a material capable of reaction with glass; it also relates to any glass object, and in particular any molding shell, comprising at least locally a mark obtained by application of such a process.
- the material constituting the layer used is chosen to be a material capable of physical reaction with the glass, and, more precisely, a material capable of diffusing therein. It is for example a cementum.
- the mark obtained advantageously has a certain coloration at the bottom of the etching.
- an engraving which mechanically ensures the durability of this mark, by reinforcing its resistance to abrasion and aggressions chemical, and, therefore, its resistance over time
- a coloring which, by enhancing its contrast, facilitates and makes it more precise for later reading.
- a material at least partially permeable to the laser beam is chosen for the material constituting the layer used and this is brought into play on the side of this layer, that is to say on the side thereof opposite to the object to be marked.
- FIG. 1 is a view in axial section of a glass object at marking of which the method according to the invention is more particularly intended;
- Figure 2 is a view which, partly taking, on a larger scale, that of Figure 1, illustrates the marking method according to the invention, according to a first embodiment thereof;
- Figure 3 is, on the scale of Figure 2, a partial view of the glass object, after its marking;
- Figure 4 is a view similar to that of Figure
- the glass object 10 to be marked is a molding shell intended to form, with a molding shell 10 'of the same type and a seal 11 disposed at the periphery of the assembly, a molding cavity 12 suitable for molding an ophthalmic lens.
- the glass object 10 is in the general form of a palet, substantially equi-thick, whose peripheral contour 13 is for example circular, and which is generally curved, with an internal face 14A of the side of the molding cavity 12 and an external face 14B on the side opposite the latter.
- the internal face 14A is concave and the external face 14B is convex.
- this mark 15 is affixed to the external face 14B of the glass object 10, in the immediate vicinity of its peripheral contour 13, and it must have dimensions as small as possible so as not to encroach, in projection, on its zone useful.
- a layer 16 of a material 17 with which a laser beam 18 is interfered with that is to say a radiation, which, emitted by a laser 19, is duly focused at a point 20 on the external face 14B by a control device 21 allowing the request to vary the deviation according to the layout of the mark 15 to be obtained.
- a control device 21 allowing the request to vary the deviation according to the layout of the mark 15 to be obtained.
- the laser 19 used is preferably a YAG type laser, with a wavelength equal to 1.06 ⁇ m.
- the material 17 constituting the layer 16 is chosen to be a material 17 capable of reaction with glass.
- a material 17 capable of diffusion in the glass is chosen.
- a cement and, more precisely, a cement comprising a mixture of copper salts with at least one other metal salt.
- the copper salts may for example be sulfates and / or phosphates, and, as other metal salts, there may be associated with them a silver oxide or phosphate, and / or various other metal oxides.
- the material 17 thus used is chosen to be at least partially permeable to the laser beam 18.
- the material 17 used is, for its application to the glass object 10, mixed with an oil, such as for example a paraffin oil.
- a rise in temperature which, on the one hand, causes by surface fusion the desired etching, in the form in practice of 'A simple frosting, and which, on the other hand, causes, by diffusion migration of the material 17 in the glass, a coloration of the bottom of the corresponding hollows.
- the control device 21 makes it possible, by deflection of the laser beam 18, to trace the mark 15 to be obtained.
- the mark 15 can be coded.
- it can be coded in the form of points aligned in rows and columns, according to a matrix type code.
- each point of the engraving obtained overall has a width of the order of 0.1 mm and a depth of 5 ⁇ m.
- the mark 15 does not encroach more than 3 mm on the surface of the external face 14B of the glass object 10.
- the layer 16 of material 17 is removed by washing, using for example a simple jet of hot water at moderate temperature, of the order of 60 ° C. , and at relatively low pressure, of the order of approximately 4 bars.
- the laser beam 18 is brought into play on the side of the glass object 10, that is to say on the side of the layer 16 facing towards this glass object 10 .
- the material 17 constituting the layer 16 can, in this case, be opaque to the laser beam 18, and, preferably, it is effectively opaque to the latter.
- the material used for the layer applied to the glass object to be marked could, as a variant, be capable of a chemical reaction with the glass, provided that this chemical reaction leads to coloration of the etching obtained.
- the field of application of the invention is not limited to the marking of molding shells only for molding ophthalmic lenses, but on the contrary extends as well the marking of any other glass object.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Ceramic Engineering (AREA)
- Surface Treatment Of Glass (AREA)
- Eyeglasses (AREA)
- Laser Beam Processing (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9504314A FR2732917B1 (en) | 1995-04-11 | 1995-04-11 | METHOD FOR LASER MARKING OF A GLASS OBJECT, AND GLASS OBJECT, IN PARTICULAR MOLDING SHELL FOR OPHTHALMIC LENS, THUS MARKED |
FR9504314 | 1995-04-11 | ||
PCT/FR1996/000533 WO1996032221A1 (en) | 1995-04-11 | 1996-04-09 | Method for laser marking a glass object, and resulting marked glass object, particularly a mould for an ophthalmic lens |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0820363A1 true EP0820363A1 (en) | 1998-01-28 |
EP0820363B1 EP0820363B1 (en) | 2000-03-22 |
Family
ID=9477982
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96912085A Revoked EP0820363B1 (en) | 1995-04-11 | 1996-04-09 | Method for laser marking a glass object, and resulting marked glass object, particularly a mould for an ophthalmic lens |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0820363B1 (en) |
AU (1) | AU701407B2 (en) |
DE (1) | DE69607336T2 (en) |
ES (1) | ES2146396T3 (en) |
FR (1) | FR2732917B1 (en) |
WO (1) | WO1996032221A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6075223A (en) | 1997-09-08 | 2000-06-13 | Thermark, Llc | High contrast surface marking |
US6852948B1 (en) | 1997-09-08 | 2005-02-08 | Thermark, Llc | High contrast surface marking using irradiation of electrostatically applied marking materials |
US6238847B1 (en) | 1997-10-16 | 2001-05-29 | Dmc Degussa Metals Catalysts Cerdec Ag | Laser marking method and apparatus |
FR2772021B1 (en) * | 1997-12-08 | 2000-02-25 | Arnaud Hory | METHOD AND DEVICE FOR MARKING OBJECTS WITH SINTERED MINERAL POWDERS |
US6503310B1 (en) | 1999-06-22 | 2003-01-07 | Dmc2 Degussa Metals Catalysts Cerdec Ag | Laser marking compositions and method |
US6503316B1 (en) | 2000-09-22 | 2003-01-07 | Dmc2 Degussa Metals Catalysts Cerdec Ag | Bismuth-containing laser markable compositions and methods of making and using same |
AUPR168000A0 (en) * | 2000-11-24 | 2000-12-21 | Sola International Holdings Ltd | Method of marking an optical element |
US7238396B2 (en) | 2002-08-02 | 2007-07-03 | Rieck Albert S | Methods for vitrescent marking |
DE102008059756A1 (en) * | 2008-12-01 | 2010-06-10 | Tesa Se | Method for marking or marking a workpiece |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3402871C2 (en) * | 1984-01-27 | 1986-08-07 | Optische Werke G. Rodenstock, 8000 München | Method for marking transparent components with a neodymium-YAG laser |
CZ277944B6 (en) * | 1990-12-03 | 1993-06-16 | Kvapil Jiri | Method of marking and decorating transparent materials by neodymium lasers |
JPH0525052A (en) * | 1991-07-19 | 1993-02-02 | Fuji Kagaku Kogyo Kk | Antifungal agent |
FR2690862A1 (en) * | 1992-05-07 | 1993-11-12 | Ares Sa | Laser engraving of the inner surfaces of transparent receptacles - notably for identification and decoration of bottles |
-
1995
- 1995-04-11 FR FR9504314A patent/FR2732917B1/en not_active Expired - Fee Related
-
1996
- 1996-04-09 AU AU55048/96A patent/AU701407B2/en not_active Ceased
- 1996-04-09 DE DE69607336T patent/DE69607336T2/en not_active Expired - Fee Related
- 1996-04-09 EP EP96912085A patent/EP0820363B1/en not_active Revoked
- 1996-04-09 ES ES96912085T patent/ES2146396T3/en not_active Expired - Lifetime
- 1996-04-09 WO PCT/FR1996/000533 patent/WO1996032221A1/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9632221A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2146396T3 (en) | 2000-08-01 |
FR2732917B1 (en) | 1997-06-13 |
FR2732917A1 (en) | 1996-10-18 |
DE69607336T2 (en) | 2000-11-30 |
AU5504896A (en) | 1996-10-30 |
EP0820363B1 (en) | 2000-03-22 |
DE69607336D1 (en) | 2000-04-27 |
AU701407B2 (en) | 1999-01-28 |
WO1996032221A1 (en) | 1996-10-17 |
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